A216085 Number of horizontal and antidiagonal neighbor colorings of the odd squares of a 3Xn array with new integer colors introduced in row major order.

1, 3, 5, 42, 136, 2440, 10900, 322776, 1805632, 77360796, 514264344, 29562890886, 226109935520, 16604827619828, 142953007039492, 12954736337254696, 123560080110698296, 13465808369740333664, 140585883811112551960

Offset: 1

Author

R. H. Hardin Sep 01 2012

Keywords

• nonn

Comments

Row 3 of A216084

Examples

			Some solutions for n=4
..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1
..2..x..0..x....1..x..0..x....2..x..0..x....2..x..3..x....2..x..3..x
..x..1..x..2....x..2..x..0....x..2..x..1....x..0..x..3....x..2..x..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..41